Love it River! This is something I will have a hard time remembering to do in our garden next spring, but I will try! Thought if it's as rainy as it was this year I won't need it. I never heard of the 8 year drought.. that's crazy! Better be ready for it again, even here.
It looks like it should work just fine. You put concret at the bottom of the pot you said? I guess it looks like clay, but that wouldn't work with clay.
Thanks and I hope it will be good for the summer!